Small Business Network

Long-time lurker here,

I recently started my internship at a company and they are wanting a complete network redesign and a windows server to be implemented. I am a senior at university and I know the basics of networking but I haven't done an actual real-life project like this before! Does anybody have tips for designing a network for a small business? Are there any documents for network design best practices?

~12 computers (wifi but wanted to be wired in the new design)

~ 2 printers

~ will be implementing VOIP phones this year so I am to include those in the design

~ 1 new server

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Thanks!